.TH std::copy_constructible 3 "2024.06.10" "http://cppreference.com" "C++ Standard Libary"
.SH NAME
std::copy_constructible \- std::copy_constructible

.SH Synopsis
   Defined in header <concepts>
   template< class T >

   concept copy_constructible =
       std::move_constructible<T> &&
       std::constructible_from<T, T&> && std::convertible_to<T&, T> &&    \fI(since C++20)\fP
       std::constructible_from<T, const T&> && std::convertible_to<const
   T&, T> &&

       std::constructible_from<T, const T> && std::convertible_to<const
   T, T>;

   The concept copy_constructible is satisfied if T is an lvalue reference type, or if
   it is a move_constructible object type where an object of that type can constructed
   from a (possibly const) lvalue or const rvalue of that type in both direct- and
   copy-initialization contexts with the usual semantics (a copy is constructed with
   the source unchanged).

   Semantic requirements

   If T is an object type, then copy_constructible<T> is modeled only if given

     * v, an lvalue of type (possibly const) T or an rvalue of type const T,

   the following are true:

     * After the definition T u = v;, u is equal to v and v is not modified;
     * T(v) is equal to v and does not modify v.

.SH See also

   is_copy_constructible
   is_trivially_copy_constructible
   is_nothrow_copy_constructible   checks if a type has a copy constructor
   \fI(C++11)\fP                         \fI(class template)\fP
   \fI(C++11)\fP
   \fI(C++11)\fP
